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Dell Data Science Foundations

Domain 5Objective 4

Describe In-Database Analytics and SQL Essentials DATA-SCIENCE-FOUNDATIONS Practice Questions (Page 4)

Part of the Advanced Analytics for Big Data - Technology and Tools domain, which accounts for 22% of the DATA-SCIENCE-FOUNDATIONS exam.

18questions here
4free pages
6concepts
22%of the exam

Questions 16–18

  1. 16application · medium

    A healthcare analytics team has two tables: `patients` (patient_id, name, age) and `appointments` (appointment_id, patient_id, appointment_date). They need a list of all patients, including those who have never had an appointment, along with their appointment dates if they exist. Which type of join should they use?

    Select an answer first
  2. 17foundation · easy

    Which SQL construct is used to return a single value that is computed from a separate query within the main query?

    Select an answer first
  3. 18foundation · easy

    Which SQL operation is used to transform a value from one data type to another during data preparation?

    Select an answer first
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